How to close the overlay after form submission

Question

In order to be able to quickly edit Fullcalendar items, I altered the node edit form of the specific content type so the events are saved with AJAX and the page doesn't have to reload.

However, I don't know how to close the overlay afterwards. I found overlay_close_dialog(), but how do I implement this in my functions (I'm very new to Drupal coding)?

Until now I have:

<?php
/**
* Implements hook_form().
*/
function fullcalendar_ajax_node_save_form_alter(&$form, &$form_state, $form_id) {
  if( $form_id == 'agenda_item_node_form') {
     $form['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Add to Apple Form'),
    '#weight' => 50,
      '#ajax' => array(
        'wrapper' => 'agenda-item-node-form',
        'callback' => 'fullcalendar_ajax_node_save_callback',
        'effect' => 'fade'
        ),
    '#submit' => 
      array (
        0 => 'node_form_submit',
      ),
    );
  }
  return $form;
}

function fullcalendar_ajax_node_save_callback($form, &$form_state) {
  $form_state['rebuild'] = TRUE;
  return $form;
}
?>

Answer 1

The callback should be:

function fullcalendar_ajax_node_save_callback(&$form, &$form_state) {
  // Could check that the overlay is open? Part of core, so overkill
  if (module_exists('overlay') && overlay_get_mode() == 'child') {
     $current_path = current_path();
     overlay_close_dialog($current_path, 
        array('query' => drupal_get_query_parameters(NULL, array('q', 'render'))));
    $form_state['redirect'] = FALSE;
  }
}

See overlay.module, about line 148 function overlay_init() for an example in core that uses as much drupal API as possible.

Answer 2

https://api.drupal.org/api/drupal/modules!overlay!overlay.module/function/overlay_close_dialog/7

function fullcalendar_ajax_node_save_form_alter(&$form, &$form_state, $form_id) {
  if( $form_id == 'agenda_item_node_form') {
     $form['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Add to Apple Form'),
    '#weight' => 50,
      '#ajax' => array(
        'wrapper' => 'agenda-item-node-form',
        'callback' => 'fullcalendar_ajax_node_save_callback',
        'effect' => 'fade'
        ),
    '#submit' => 
      array (
        0 => 'node_form_submit',
        1 => 'your_custom_callback'
      ),
    );
  }
  return $form;
}

function your_custom_callback($form, &$form_state) {

  $url = "<front>";
  if (module_exists('overlay') && overlay_get_mode() == 'child') {
    unset($_GET['destination']);
    overlay_close_dialog($url, array('external' => TRUE));
    $form_state['redirect'] = FALSE;
  } else {
    $form_state['redirect'] = $url;
  }
}